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Loans - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Ending allowance balance attributable to loans: |  |  |  |
Allowance for loan losses | $ 57,027 | $ 17,667 | $ 17,820 | $ 16,394
Loans: |  |  |  |
Loans (excluding loan level hedges), net | $ 3,810,356 |  |  |
Total ending loans balance |  | 7,351 |  |
Loans |  |  |  |
Loans: |  |  |  |
Individually evaluated for impairment |  | 7,347 |  |
Collectively evaluated for impairment |  | 3,627,249 |  |
Loans (excluding loan level hedges), net |  | 0 |  |
Total ending loans balance |  | 3,634,596 |  |
Mortgage warehouse | Loans |  |  |  |
Loans: |  |  |  |
Individually evaluated for impairment |  | 0 |  |
Collectively evaluated for impairment |  | 150,293 |  |
Loans (excluding loan level hedges), net |  | 0 |  |
Total ending loans balance |  | 150,293 |  |
Allowance For Loan Losses |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  | 541 |  |
Collectively evaluated for impairment |  | 17,126 |  |
Loans acquired with deteriorated credit quality |  | 0 |  |
Allowance for loan losses |  | 17,667 |  |
Allowance For Loan Losses | Mortgage warehouse |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  | 0 |  |
Collectively evaluated for impairment |  | 1,077 |  |
Loans acquired with deteriorated credit quality |  | 0 |  |
Allowance for loan losses |  | 1,077 |  |
Commercial | Loans |  |  |  |
Loans: |  |  |  |
Individually evaluated for impairment |  | 7,347 |  |
Collectively evaluated for impairment |  | 2,040,299 |  |
Loans (excluding loan level hedges), net |  | 0 |  |
Total ending loans balance |  | 2,047,646 |  |
Commercial | Allowance For Loan Losses |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  | 541 |  |
Collectively evaluated for impairment |  | 11,455 |  |
Loans acquired with deteriorated credit quality |  | 0 |  |
Allowance for loan losses |  | 11,996 |  |
Real estate | Loans |  |  |  |
Loans: |  |  |  |
Individually evaluated for impairment |  | 0 |  |
Collectively evaluated for impairment |  | 770,705 |  |
Loans (excluding loan level hedges), net |  | 0 |  |
Total ending loans balance |  | 770,705 |  |
Real estate | Allowance For Loan Losses |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  | 0 |  |
Collectively evaluated for impairment |  | 923 |  |
Loans acquired with deteriorated credit quality |  | 0 |  |
Allowance for loan losses |  | 923 |  |
Consumer | Loans |  |  |  |
Loans: |  |  |  |
Individually evaluated for impairment |  | 0 |  |
Collectively evaluated for impairment |  | 665,952 |  |
Loans (excluding loan level hedges), net |  | 0 |  |
Total ending loans balance |  | 665,952 |  |
Consumer | Allowance For Loan Losses |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  | 0 |  |
Collectively evaluated for impairment |  | 3,671 |  |
Loans acquired with deteriorated credit quality |  | 0 |  |
Allowance for loan losses |  | $ 3,671 |  |

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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